Some days, it feels like it can be difficult to get people excited about space exploration. It's space! It's the universe! Get excited already! Which is why NASA, being the lovable nerds that they are, have decided to use Peter Cullen, AKA the voice of Optimus Prime, to get you pumped about the Hubble's successor. »6/17/14 12:30pm 6/17/14 12:30pm